Borax-rubbing machine.



No. 740,146. PATENTED SEPT. 29, 1903. -A. LA FRANCIS & F. J. KRUM-EIGH.

BORAX RUBBING MACHINE.

APPLICATION FILED FEB. 11, 1901.

3 SHEETS-$11331 1.

H0 MODEL.

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WITNESSES:

ATTORNEYS.

No. 740,146; PATENTED SEPT. 29, 1903. A. LA FRANCIS & F. J. KRUMBICH.

BORAX RUBB ING MACHINE APPLICATION FILED rm. 11. 1901.

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I No 740,146.

UNITED STA ES- iatented September 29, 1903.

PATENT ANTHONY LA rumors, on nner cannons-n1) FRANK J. KRUMEICH, orNEWARKJNEW JERSEY.

BORAX-RUBBING MACHINE.

SPECIFICATION forming Of Letters Patent NO. 740,146, dated September 29,1 903.

Application filed February 11, 1901. Serial No. 46,813. (No model.)

To all whom it may concern:

Be it known that we, ANTHONYLA FBANcIs,

residing at East Orange, and FRANK J. KRU- MEIOH, residing at Newark, inthe county of Essex and State of New Jersey, citizens of the UnitedStates, have invented certain new and useful Improvements inBorax-Rubbing Machines; and we do hereby declare the fol union of theparts being joined. This borax is furnished as a solid in the form ofsticks,

- and a solution or fluid is secured by rubbing the end of the stick ona' concaved stone moistened with a little water. This rubbing if done byhand is very'tedious and laborious; and the general object of ourinvention is to provide an improved machine for doing the work. 7

Other objects are to enable a plurality of sticks of borax to be groundat one time in uniform relation to the stone, to provide an even anduniform supplyof water to the several sticks, to secure acollection ofthe fluid as it is produced without interfering with the grinding andwithout wasting or losing any of said fluid, to obtain a simple andefficient machine, and to secure otheradvan;

tages and results, some of which maybe referred to hereinafter inconnection with the description of the working'parts.

The invention consists in the improved borax rubbing machine and in thearrangements and combinations of parts of the same, all substantially aswill be hereinafter set forth and finally embraced in the clauses of theclaim.

' Referring to the accompanying drawings,

proved machine. Fig. 2 is a front view of the same. Fig. 3 is a verticalcentral section on line m, Fig. 2. Fig. 4 is a cross-section taken online y, Fig. 1; and Figs. 5 and 6 are detail views showing in front andside elevation, respectively, a certain collecting spout or plate.

In said drawings, a indicates a frame cast out of metal or otherwisesuitably formed and adapted to be screwed at its lower end a, to thefloor and extend upward therefrom.

From the lower part of the said frame arms 12 h project forward, whichprovide vertical journals b for a vertical shaft 0. Said shaft isadapted to be rotated in said bearings by any suitable means, being heldagainst longitudinal movement downward by a collar b or by any otherequivalent means. We have shown said shaft 0 as rotated by a grooved 7opulley d, fast on the said shaft and around which a beltd is adapted topass, said belt being led away over idle pulleys d d to any suitablepower means. It is evident, however, that any system of gearing or othermeans might be used to transmit motion to the shaft 0. Said shaft 0 atits upper end has outwardlyprojecting radial arms 0, forming a base uponwhich lies a circular or disk-like grinding-stone f in horizontalposition. The extremities of the arms c, as at 0 preferably receiveholding screws extending upward into the stone f, whereby the stone isconnected to the shaft 0 to rotate therewith. The grinding-stonef ispreferably fiat on its upper surface with its circular edge extendingdownward at right angles to said upper surface, although the stonemight, if desired,

be concaved or convexed at the top and have its edges inclined. Theupper end of the 0 frame a bends over, as at a and supports a horizontalplate g above the grinding-stone preferably by a vertical stem gt on theplate. Said plate, stem, and the frame a may be all one integral piece,or any two integral, or all 5 separate and connected by any suitableknown means, as may be found most convenient in manufacture. In saidplate g, which is preferably of a trifoliate shape, is a series I wardfrom the edge of the plate.

ting nicely in the openingj in the plate and being held by a set-screw2', extending in- Said'tubes are to be thus adjusted in height so thattheir lower endslie slightly above the grindingstone f, and into each ofthe tubes is then dropped a stick of borax h, which rests at its lowerend upon the grinding-stone f when the machine is to be used.

Into the top of each tube 2' above the stick of borax h is dropped acylindrical Weight 71:, which rests upon the top of the stick of boraxand presses its lower end against the grinding-stone. The upper end ofthe weight has a handle 70 for convenience and also a peripheral stop toprevent the weight from dropping against the grinding-stone when theboraX is used up.

Through the plate g and its stem g extends a Vertical passage or socketZ, which receives the downwardly-extending delivery-tube m of a watertank or reservoir m. Said seat or socket l is reduced in diameter at itslower part to form a shoulder Z, upon which a corresponding shoulder ofthe tube m sits, and the lower extremity of the delivery-tube m isbrought to a nozzle m terminating close to the'grinding-stonefat itscenter. Above the point of support of the said delivery-tube m and belowthe reservoir m are two stop-cocks n and 02, arranged in thedelivery-tube, the upper one of which can be freely turned into open orclosed position to stop or start the flowof water, the other or lowercook 11. being permanently turned at such an angle as to give thedesired size of stream at the nozzle m From the foregoing description ofthe machine it will be seen that as the grindingstone f is rotated itengages the several sticks of borax each in the same relative positionto the stone and that the supply of water issuing from the nozzle m atthe center of the stone will be equally and uniformly distributed bycentrifugal forcetothe several sticks of borax alike. Furthermore, whilethe water is thus supplied (preferably by drops) to the part of thegrinding-disk having the least motion it will be noted that the sticksof borax engage the stone at the part having the greatest motion, sincethe holders 2' are substantially flush at their outer sides with theouter edges of the grinding-disk. While a considerable action of thestone upon the sticks of borax is thus secured, the water is suppliedgently and almost imperceptibly, so that there is no splashing oragitation such as would prevent a smooth uniform mixture of the boraxwith the water and a retention of said mixture on the stone until ofnecessary syrupy consistency.

The fluid or semifluid resulting from the grinding or rubbing operationis urged by centrifugal force over the edges of the grinding-stone; butbecause of its thick syrupy consistency it does not run off the stoneuntil drops of considerable size have gathered.

Before such drops have formed large enough to detach themselves therotation of the grinding-stone brings them around to a scraper orcollector o, fastened upon the frame a by screws 0' at one side of thegrinding-stone, special reference being had to Fig. 1. Said collector 0,which is shown in detail in Figs. 5 and 6, comprises a plate p, of sheetmetal, vertically arranged with an edge 19 close to, but not touching,the peripheral side f of the grinding-stone. Below said edge 19 is anoffset q of the plate, which extends in under the grinding-stone, and tothe face of the plate 1) is attached below the edgep a spout r, intowhich the fluid scraped from the grindingstone runs. A shelf 8, whichmay be either cast on the frame or bolted thereto, provides a supportfor a vessel t to receive the fluid from the spout 1' and from which theworkmen can take such fluid as they need it in their work. Said shelfpreferably has an aperture 8 to receive a lug t in the vessel 23 andprevent displacement of said vessel from the shelf.

Various modifications of construction may be made and well-knownequivalents substituted for the parts positively described hereinwithout departing from the spirit and scope of the invention, and we donot wish to be limited by our positive description except as the stateof the art may require.

Having thus described the invention, what we claim as new is- 1. In aborax-rubbing machine, the combination of a horizontal and rotatablegrindingdisk presenting a flat top in the form of a complete circle andbeing supported wholly from beneath, means for rotating saidgrinding-disk, a fixed arm extending radially in over the top of thegrinding-disk and carrying a single integral supporting-frame having aperforation in vertical line with the center of the grinding-disk and aseries of apertures around said perforation, a water-supply tube havinga straight discharge end seated in said perforation and terminating atits open extremity close to the grinding-disk, and tubular holdersadjust-ably mounted in the said surrounding apertures of the supportingframe and adapted to receive sticks of borax.

2. The combination of the frame a, having at its lower portion upperandlower arms I), provided with bearings for a vertical shaft, saidvertical shaft, and means for rotating the same, a solid grinding-diskmounted in horizontal position upon the upper end of said shaft andhaving a fiat top, said frame extending upward at one side of thegrindingdisk and bending radially inward over the same and beingperforated in vertical line with the center of the grinding-disk, awatersupply duct having a straight discharge end seated in saidperforation and terminating at its open extremity adjacent to the top ofthe grindingdisk, and holders upon said inwardly-bent end of the upperpartof the frame adapted to receive sticks of borax, and being arrangedin an annular series around said water-tuba 3. In a borax-rubbingmachine, the combination with a horizontal grinding-disk having a flatunbroken top and being supported from beneath, and means for rotatingthe same, of a water-supply pipe approaching the grinding-diskperpendicularly at its center and terminating closely adjacent theretoin a single discharge-opening, whereby the water is supplied to thatpart of the grinding-disk having the least motion, and means for holdingsticks of borax in engagement with said top of the grinding-disk.

4. In a boraX-rubbing machine, the combination with a horizontalcircular grindingdisk having a flat unbroken top and being supportedfrom beneath, and means for rotating the same,of a water-supply pipeapproaching the grinding-disk perpendicularly at its center andterminating closely adjacent thereto in a single discharge-opening,whereby the water is supplied to that part of the grinding-disk havingthe least motion, and holders arranged around said water-supply pipeparallel thereto and each adapted to re-v 7 of January, 1901.

ANTHONY LA FRANCIS. FRANK J. KRUMEICH.

Witnesses:

CHARLES H. PELL, J. E. ALEXANDER.

